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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2008 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: HL7Message.html 21 2014-09-19 19:17:15Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.hl7;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.io.Serializable;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.util.regex.Matcher;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.regex.Pattern;<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>/**<a name="line.14"></a>
<span class="sourceLineNo">015</span> * Represents an HL7 message.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>@SuppressWarnings("serial")<a name="line.17"></a>
<span class="sourceLineNo">018</span>public class HL7Message implements Serializable {<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>    /**<a name="line.20"></a>
<span class="sourceLineNo">021</span>     * The character that separates segments in an HL7 message.<a name="line.21"></a>
<span class="sourceLineNo">022</span>     */<a name="line.22"></a>
<span class="sourceLineNo">023</span>    public static final char SEGMENT_TERMINATOR = '\r';<a name="line.23"></a>
<span class="sourceLineNo">024</span><a name="line.24"></a>
<span class="sourceLineNo">025</span>    private static final Pattern FIELD_NAME_PATTERN = Pattern.compile("([\\p{Alnum}]{3})\\.[0-9]+");<a name="line.25"></a>
<span class="sourceLineNo">026</span><a name="line.26"></a>
<span class="sourceLineNo">027</span>    private static final Pattern VALUE_NAME_PATTERN = Pattern.compile("(" + FIELD_NAME_PATTERN + ")(\\.([0-9]+)(\\.([0-9]+))?)?");<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>    /**<a name="line.29"></a>
<span class="sourceLineNo">030</span>     * The segments in this message. This list always contains at least<a name="line.30"></a>
<span class="sourceLineNo">031</span>     * one element, namely the {@link MSHSegment}.<a name="line.31"></a>
<span class="sourceLineNo">032</span>     */<a name="line.32"></a>
<span class="sourceLineNo">033</span>    protected final HL7SegmentList segments;<a name="line.33"></a>
<span class="sourceLineNo">034</span><a name="line.34"></a>
<span class="sourceLineNo">035</span>    /**<a name="line.35"></a>
<span class="sourceLineNo">036</span>     * Construct a new HL7 message containing only the given MSH segment.<a name="line.36"></a>
<span class="sourceLineNo">037</span>     *<a name="line.37"></a>
<span class="sourceLineNo">038</span>     * @param msh MSH segment<a name="line.38"></a>
<span class="sourceLineNo">039</span>     */<a name="line.39"></a>
<span class="sourceLineNo">040</span>    public HL7Message(MSHSegment msh) {<a name="line.40"></a>
<span class="sourceLineNo">041</span>        this.segments = new HL7SegmentList(msh);<a name="line.41"></a>
<span class="sourceLineNo">042</span>    }<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>    /**<a name="line.44"></a>
<span class="sourceLineNo">045</span>     * Construct an empty HL7 message.<a name="line.45"></a>
<span class="sourceLineNo">046</span>     *<a name="line.46"></a>
<span class="sourceLineNo">047</span>     * &lt;p&gt;<a name="line.47"></a>
<span class="sourceLineNo">048</span>     * A MSH segment will be automatically added.<a name="line.48"></a>
<span class="sourceLineNo">049</span>     *<a name="line.49"></a>
<span class="sourceLineNo">050</span>     * @param seps separator and escape characters to use for this message<a name="line.50"></a>
<span class="sourceLineNo">051</span>     */<a name="line.51"></a>
<span class="sourceLineNo">052</span>    public HL7Message(HL7Seps seps) {<a name="line.52"></a>
<span class="sourceLineNo">053</span>        this.segments = new HL7SegmentList(new MSHSegment(seps));<a name="line.53"></a>
<span class="sourceLineNo">054</span>    }<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span>    /**<a name="line.56"></a>
<span class="sourceLineNo">057</span>     * Convenience constructor. Equivalent to:<a name="line.57"></a>
<span class="sourceLineNo">058</span>     *  &lt;blockquote&gt;<a name="line.58"></a>
<span class="sourceLineNo">059</span>     *  &lt;code&gt;HL7Message(HL7Seps.DEFAULT)&lt;/code&gt;<a name="line.59"></a>
<span class="sourceLineNo">060</span>     *  &lt;blockquote&gt;<a name="line.60"></a>
<span class="sourceLineNo">061</span>     */<a name="line.61"></a>
<span class="sourceLineNo">062</span>    public HL7Message() {<a name="line.62"></a>
<span class="sourceLineNo">063</span>        this(HL7Seps.DEFAULT);<a name="line.63"></a>
<span class="sourceLineNo">064</span>    }<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span>    /**<a name="line.66"></a>
<span class="sourceLineNo">067</span>     * Parsing constructor. Constructs an HL7 message by parsing the given string.<a name="line.67"></a>
<span class="sourceLineNo">068</span>     * Segments must be separated with a carriage return character.<a name="line.68"></a>
<span class="sourceLineNo">069</span>     *<a name="line.69"></a>
<span class="sourceLineNo">070</span>     * @throws HL7ContentException if the string is invalid<a name="line.70"></a>
<span class="sourceLineNo">071</span>     */<a name="line.71"></a>
<span class="sourceLineNo">072</span>    public HL7Message(String msg) throws HL7ContentException {<a name="line.72"></a>
<span class="sourceLineNo">073</span><a name="line.73"></a>
<span class="sourceLineNo">074</span>        // Eliminate trailing CR's<a name="line.74"></a>
<span class="sourceLineNo">075</span>        int len = msg.length();<a name="line.75"></a>
<span class="sourceLineNo">076</span>        while (len &gt; 0 &amp;&amp; msg.charAt(len - 1) == SEGMENT_TERMINATOR)<a name="line.76"></a>
<span class="sourceLineNo">077</span>            msg = msg.substring(0, --len);<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span>        // Split message into segments<a name="line.79"></a>
<span class="sourceLineNo">080</span>        int[] segs = HL7Util.find(msg, SEGMENT_TERMINATOR);<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span>        // Get MSH segment with message-specific separator characters<a name="line.82"></a>
<span class="sourceLineNo">083</span>        MSHSegment msh = new MSHSegment(msg.substring(0, segs[0]));<a name="line.83"></a>
<span class="sourceLineNo">084</span>        this.segments = new HL7SegmentList(msh);<a name="line.84"></a>
<span class="sourceLineNo">085</span>        HL7Seps seps = msh.getHL7Seps();<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>
<span class="sourceLineNo">087</span>        // Workaround McKesson HBOC bug (extra mid-segment carriage returns)<a name="line.87"></a>
<span class="sourceLineNo">088</span>        for (int i = 1; i &lt; segs.length - 1; ) {<a name="line.88"></a>
<span class="sourceLineNo">089</span>            if (segs[i] + 3 &gt;= msg.length()<a name="line.89"></a>
<span class="sourceLineNo">090</span>              || msg.charAt(segs[i] + 1) == seps.getFieldSep()<a name="line.90"></a>
<span class="sourceLineNo">091</span>              || msg.charAt(segs[i] + 2) == seps.getFieldSep()<a name="line.91"></a>
<span class="sourceLineNo">092</span>              || msg.charAt(segs[i] + 3) == seps.getFieldSep()) {<a name="line.92"></a>
<span class="sourceLineNo">093</span>                msg = msg.substring(0, segs[i]) + msg.substring(segs[i] + 1);<a name="line.93"></a>
<span class="sourceLineNo">094</span>                for (int j = i + 1; j &lt; segs.length; j++)<a name="line.94"></a>
<span class="sourceLineNo">095</span>                    segs[j]--;<a name="line.95"></a>
<span class="sourceLineNo">096</span>                int[] segs2 = new int[segs.length - 1];<a name="line.96"></a>
<span class="sourceLineNo">097</span>                System.arraycopy(segs, 0, segs2, 0, i);<a name="line.97"></a>
<span class="sourceLineNo">098</span>                System.arraycopy(segs, i + 1, segs2, i, segs2.length - i);<a name="line.98"></a>
<span class="sourceLineNo">099</span>                segs = segs2;<a name="line.99"></a>
<span class="sourceLineNo">100</span>            } else<a name="line.100"></a>
<span class="sourceLineNo">101</span>                i++;<a name="line.101"></a>
<span class="sourceLineNo">102</span>        }<a name="line.102"></a>
<span class="sourceLineNo">103</span><a name="line.103"></a>
<span class="sourceLineNo">104</span>        // Add subsequent segments<a name="line.104"></a>
<span class="sourceLineNo">105</span>        for (int i = 0; i &lt; segs.length - 1; i++)<a name="line.105"></a>
<span class="sourceLineNo">106</span>            this.segments.add(new HL7Segment(msg.substring(segs[i] + 1, segs[i + 1]), seps));<a name="line.106"></a>
<span class="sourceLineNo">107</span>    }<a name="line.107"></a>
<span class="sourceLineNo">108</span><a name="line.108"></a>
<span class="sourceLineNo">109</span>    /**<a name="line.109"></a>
<span class="sourceLineNo">110</span>     * Get the MSH segment of this message.<a name="line.110"></a>
<span class="sourceLineNo">111</span>     *<a name="line.111"></a>
<span class="sourceLineNo">112</span>     * @return this message's MSH segment (not a copy; changes are reflected back)<a name="line.112"></a>
<span class="sourceLineNo">113</span>     */<a name="line.113"></a>
<span class="sourceLineNo">114</span>    public MSHSegment getMSHSegment() {<a name="line.114"></a>
<span class="sourceLineNo">115</span>        return (MSHSegment)this.segments.get(0);<a name="line.115"></a>
<span class="sourceLineNo">116</span>    }<a name="line.116"></a>
<span class="sourceLineNo">117</span><a name="line.117"></a>
<span class="sourceLineNo">118</span>    /**<a name="line.118"></a>
<span class="sourceLineNo">119</span>     * Get all of the segments in this message.<a name="line.119"></a>
<span class="sourceLineNo">120</span>     *<a name="line.120"></a>
<span class="sourceLineNo">121</span>     * &lt;p&gt;<a name="line.121"></a>
<span class="sourceLineNo">122</span>     * The returned list does not allow removing the first element (the MSH segment) or changing it to anything other than an<a name="line.122"></a>
<span class="sourceLineNo">123</span>     * {@link MSHSegment}.<a name="line.123"></a>
<span class="sourceLineNo">124</span>     *<a name="line.124"></a>
<span class="sourceLineNo">125</span>     * @return list of all message segments including MSH<a name="line.125"></a>
<span class="sourceLineNo">126</span>     */<a name="line.126"></a>
<span class="sourceLineNo">127</span>    public HL7SegmentList getSegments() {<a name="line.127"></a>
<span class="sourceLineNo">128</span>        return this.segments;<a name="line.128"></a>
<span class="sourceLineNo">129</span>    }<a name="line.129"></a>
<span class="sourceLineNo">130</span><a name="line.130"></a>
<span class="sourceLineNo">131</span>    /**<a name="line.131"></a>
<span class="sourceLineNo">132</span>     * Get the first occurrence of a &lt;code&gt;segname&lt;/code&gt; segment in this message.<a name="line.132"></a>
<span class="sourceLineNo">133</span>     *<a name="line.133"></a>
<span class="sourceLineNo">134</span>     * @param segname segment name, e.g., "PV1"<a name="line.134"></a>
<span class="sourceLineNo">135</span>     * @param segnum starting segment index to start search;<a name="line.135"></a>
<span class="sourceLineNo">136</span>     *  index zero refers to the MSH segment<a name="line.136"></a>
<span class="sourceLineNo">137</span>     * @return first matching segment found, or null if not found<a name="line.137"></a>
<span class="sourceLineNo">138</span>     * @throws IllegalArgumentException if segnum is negative<a name="line.138"></a>
<span class="sourceLineNo">139</span>     */<a name="line.139"></a>
<span class="sourceLineNo">140</span>    public HL7Segment findSegment(String segname, int segnum) {<a name="line.140"></a>
<span class="sourceLineNo">141</span>        if (segnum &lt; 0)<a name="line.141"></a>
<span class="sourceLineNo">142</span>            throw new IllegalArgumentException("segnum=" + segnum);<a name="line.142"></a>
<span class="sourceLineNo">143</span>        for (int i = segnum; i &lt; this.segments.size(); i++) {<a name="line.143"></a>
<span class="sourceLineNo">144</span>            HL7Segment seg = this.segments.get(i);<a name="line.144"></a>
<span class="sourceLineNo">145</span>            if (seg.getName().equals(segname))<a name="line.145"></a>
<span class="sourceLineNo">146</span>                return seg;<a name="line.146"></a>
<span class="sourceLineNo">147</span>        }<a name="line.147"></a>
<span class="sourceLineNo">148</span>        return null;<a name="line.148"></a>
<span class="sourceLineNo">149</span>    }<a name="line.149"></a>
<span class="sourceLineNo">150</span><a name="line.150"></a>
<span class="sourceLineNo">151</span>    /**<a name="line.151"></a>
<span class="sourceLineNo">152</span>     * Convenience method. Equivalent to:<a name="line.152"></a>
<span class="sourceLineNo">153</span>     *  &lt;blockquote&gt;<a name="line.153"></a>
<span class="sourceLineNo">154</span>     *  &lt;code&gt;findSegment(name, 0)&lt;/code&gt;<a name="line.154"></a>
<span class="sourceLineNo">155</span>     *  &lt;blockquote&gt;<a name="line.155"></a>
<span class="sourceLineNo">156</span>     */<a name="line.156"></a>
<span class="sourceLineNo">157</span>    public HL7Segment findSegment(String segname) {<a name="line.157"></a>
<span class="sourceLineNo">158</span>        return this.findSegment(segname, 0);<a name="line.158"></a>
<span class="sourceLineNo">159</span>    }<a name="line.159"></a>
<span class="sourceLineNo">160</span><a name="line.160"></a>
<span class="sourceLineNo">161</span>    /**<a name="line.161"></a>
<span class="sourceLineNo">162</span>     * Find a field by HL7 name. The name is of the form XYZ.N where<a name="line.162"></a>
<span class="sourceLineNo">163</span>     * "XYZ" is the segment name and "N" is the field number.<a name="line.163"></a>
<span class="sourceLineNo">164</span>     *<a name="line.164"></a>
<span class="sourceLineNo">165</span>     * @param name field name, e.g., "PV1.3"<a name="line.165"></a>
<span class="sourceLineNo">166</span>     * @param segnum starting segment index (zero to start from MSH segment)<a name="line.166"></a>
<span class="sourceLineNo">167</span>     * @return named HL7 field, or &lt;code&gt;null&lt;/code&gt; if the named field doesn't exist in this message<a name="line.167"></a>
<span class="sourceLineNo">168</span>     * @throws IllegalArgumentException if name is not properly formatted<a name="line.168"></a>
<span class="sourceLineNo">169</span>     * @throws IllegalArgumentException if segnum is negative<a name="line.169"></a>
<span class="sourceLineNo">170</span>     */<a name="line.170"></a>
<span class="sourceLineNo">171</span>    public HL7Field getField(String name, int segnum) {<a name="line.171"></a>
<span class="sourceLineNo">172</span><a name="line.172"></a>
<span class="sourceLineNo">173</span>        // Check parameters<a name="line.173"></a>
<span class="sourceLineNo">174</span>        Matcher matcher = FIELD_NAME_PATTERN.matcher(name);<a name="line.174"></a>
<span class="sourceLineNo">175</span>        if (!matcher.matches())<a name="line.175"></a>
<span class="sourceLineNo">176</span>            throw new IllegalArgumentException("invalid name `" + name + "'");<a name="line.176"></a>
<span class="sourceLineNo">177</span>        int fieldIndex;<a name="line.177"></a>
<span class="sourceLineNo">178</span>        try {<a name="line.178"></a>
<span class="sourceLineNo">179</span>            fieldIndex = Integer.parseInt(name.substring(4), 10);<a name="line.179"></a>
<span class="sourceLineNo">180</span>        } catch (NumberFormatException e) {<a name="line.180"></a>
<span class="sourceLineNo">181</span>            throw new IllegalArgumentException("invalid name `" + name + "'");<a name="line.181"></a>
<span class="sourceLineNo">182</span>        }<a name="line.182"></a>
<span class="sourceLineNo">183</span><a name="line.183"></a>
<span class="sourceLineNo">184</span>        // Find segment, then field<a name="line.184"></a>
<span class="sourceLineNo">185</span>        HL7Segment seg = this.findSegment(name.substring(0, 3), segnum);<a name="line.185"></a>
<span class="sourceLineNo">186</span>        return seg != null ? seg.getField(fieldIndex) : null;<a name="line.186"></a>
<span class="sourceLineNo">187</span>    }<a name="line.187"></a>
<span class="sourceLineNo">188</span><a name="line.188"></a>
<span class="sourceLineNo">189</span>    /**<a name="line.189"></a>
<span class="sourceLineNo">190</span>     * Convenience method. Equivalent to:<a name="line.190"></a>
<span class="sourceLineNo">191</span>     *  &lt;blockquote&gt;<a name="line.191"></a>
<span class="sourceLineNo">192</span>     *  &lt;code&gt;getField(name, 0)&lt;/code&gt;<a name="line.192"></a>
<span class="sourceLineNo">193</span>     *  &lt;blockquote&gt;<a name="line.193"></a>
<span class="sourceLineNo">194</span>     */<a name="line.194"></a>
<span class="sourceLineNo">195</span>    public HL7Field getField(String name) {<a name="line.195"></a>
<span class="sourceLineNo">196</span>        return this.getField(name, 0);<a name="line.196"></a>
<span class="sourceLineNo">197</span>    }<a name="line.197"></a>
<span class="sourceLineNo">198</span><a name="line.198"></a>
<span class="sourceLineNo">199</span>    /**<a name="line.199"></a>
<span class="sourceLineNo">200</span>     * Find a string value by HL7 name. The name is of the form {@code XYZ.N[.M[.L]]}<a name="line.200"></a>
<span class="sourceLineNo">201</span>     * where {@code XYZ} is the segment name, {@code N} is the field number, {@code M} is the<a name="line.201"></a>
<span class="sourceLineNo">202</span>     * optional component number, and {@code L} is the optional subcomponent number.<a name="line.202"></a>
<span class="sourceLineNo">203</span>     *<a name="line.203"></a>
<span class="sourceLineNo">204</span>     * &lt;p&gt;<a name="line.204"></a>
<span class="sourceLineNo">205</span>     * If either of {@code M} or {@code L} are not given, they are assumed to be {@code 1}<a name="line.205"></a>
<span class="sourceLineNo">206</span>     * so an unambiguous string value can always be returned.<a name="line.206"></a>
<span class="sourceLineNo">207</span>     *<a name="line.207"></a>
<span class="sourceLineNo">208</span>     * @param name HL7 value name, e.g., "PV1.3", "MSH.9.1", "ZZZ.3.2.1"<a name="line.208"></a>
<span class="sourceLineNo">209</span>     * @param segnum starting segment index<a name="line.209"></a>
<span class="sourceLineNo">210</span>     * @param repeat repeat index (starting from zero)<a name="line.210"></a>
<span class="sourceLineNo">211</span>     * @return named HL7 value, or &lt;code&gt;null&lt;/code&gt; if the named value doesn't exist in this message<a name="line.211"></a>
<span class="sourceLineNo">212</span>     * @throws IllegalArgumentException if name is not properly formatted<a name="line.212"></a>
<span class="sourceLineNo">213</span>     * @throws IllegalArgumentException if "M" or "L" is negative<a name="line.213"></a>
<span class="sourceLineNo">214</span>     * @throws IllegalArgumentException if segnum or repeat is negative<a name="line.214"></a>
<span class="sourceLineNo">215</span>     */<a name="line.215"></a>
<span class="sourceLineNo">216</span>    public String get(String name, int segnum, int repeat) {<a name="line.216"></a>
<span class="sourceLineNo">217</span><a name="line.217"></a>
<span class="sourceLineNo">218</span>        // Find field first<a name="line.218"></a>
<span class="sourceLineNo">219</span>        Matcher matcher = VALUE_NAME_PATTERN.matcher(name);<a name="line.219"></a>
<span class="sourceLineNo">220</span>        if (!matcher.matches())<a name="line.220"></a>
<span class="sourceLineNo">221</span>            throw new IllegalArgumentException("invalid name `" + name + "'");<a name="line.221"></a>
<span class="sourceLineNo">222</span>        HL7Field field = this.getField(matcher.group(1), segnum);<a name="line.222"></a>
<span class="sourceLineNo">223</span>        if (field == null)<a name="line.223"></a>
<span class="sourceLineNo">224</span>            return null;<a name="line.224"></a>
<span class="sourceLineNo">225</span><a name="line.225"></a>
<span class="sourceLineNo">226</span>        // Get component and subcomponent indicies<a name="line.226"></a>
<span class="sourceLineNo">227</span>        int component = 0;<a name="line.227"></a>
<span class="sourceLineNo">228</span>        String value = matcher.group(4);<a name="line.228"></a>
<span class="sourceLineNo">229</span>        if (value != null) {<a name="line.229"></a>
<span class="sourceLineNo">230</span>            try {<a name="line.230"></a>
<span class="sourceLineNo">231</span>                component = Integer.parseInt(value, 10) - 1;<a name="line.231"></a>
<span class="sourceLineNo">232</span>            } catch (NumberFormatException e) {<a name="line.232"></a>
<span class="sourceLineNo">233</span>                throw new IllegalArgumentException("invalid component index `" + value + "'");<a name="line.233"></a>
<span class="sourceLineNo">234</span>            }<a name="line.234"></a>
<span class="sourceLineNo">235</span>        }<a name="line.235"></a>
<span class="sourceLineNo">236</span>        int subcomponent = 0;<a name="line.236"></a>
<span class="sourceLineNo">237</span>        value = matcher.group(6);<a name="line.237"></a>
<span class="sourceLineNo">238</span>        if (value != null) {<a name="line.238"></a>
<span class="sourceLineNo">239</span>            try {<a name="line.239"></a>
<span class="sourceLineNo">240</span>                subcomponent = Integer.parseInt(value, 10) - 1;<a name="line.240"></a>
<span class="sourceLineNo">241</span>            } catch (NumberFormatException e) {<a name="line.241"></a>
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</pre>
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